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https://www.readbyqxmd.com/read/28416155/tracking-of-muscular-strength-and-power-from-youth-to-young-adulthood-longitudinal-findings-from-the-childhood-determinants-of-adult-health-study
#1
Brooklyn J Fraser, Michael D Schmidt, Quan L Huynh, Terence Dwyer, Alison J Venn, Costan G Magnussen
OBJECTIVES: Low muscular fitness levels have previously been reported as an independent risk factor for chronic disease outcomes. Muscular fitness tracking, the ability to maintain levels measured at one point in time to another point in time, was assessed from youth to adulthood to provide insight into whether early identification of low muscular fitness in youth is possible. DESIGN: Prospective longitudinal study. METHODS: Study including 623 participants who had muscular fitness measures in 1985 (aged 9, 12 or 15 years) and again 20 years later in young adulthood...
March 31, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28410998/a-retrospective-longitudinal-analysis-of-anthropometric-and-physical-qualities-that-associate-with-adult-career-attainment-in-junior-rugby-league-players
#2
Kevin Till, David Morley, John O'Hara, Ben L Jones, Chris Chapman, Clive B Beggs, Carlton Cooke, Stephen Cobley
OBJECTIVES: To retrospectively compare the longitudinal physical development of junior rugby league players between the Under 13 and 15 age categories in relation to their adult career attainment outcome. DESIGN: Retrospective longitudinal design. METHODS: Fifty-one former junior rugby league players were retrospectively grouped according to their career attainment outcome as adults (i.e., amateur, academy or professional). As juniors, players undertook a physical testing battery on three consecutive annual occasions (Under 13s, 14s, 15s) including height, body mass, sum of four skinfolds, maturation, vertical jump, medicine ball chest throw, 10-60m sprint, agility 505 and estimated V˙O2max ...
March 30, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28394832/strength-and-conditioning-training-by-the-danish-national-handball-team-prior-to-an-olympic-tournament
#3
Thue Kvorning, Mikkel R B Hansen, Kurt Jensen
The physical demands imposed on national team handball teams during the Olympics imply significant physical preparation in order to improve performance and reduce incidence of injuries. The purpose of the present case report is to describe and analyze the strength and conditioning (S&C) training carried out by the Danish national handball team before the Beijing Olympic Games. Eight weeks of S&C was divided into blocks of 5 weeks emphasizing muscle hypertrophy and long interval running followed by 3 weeks emphasizing strength, power and short interval running...
April 7, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28378960/effects-of-the-aca-on-health-care-cost-containment
#4
Janet Weiner, Clifford Marks, Mark Pauly
This brief reviews the evidence on how key ACA provisions have affected the growth of health care costs. Coverage expansions produced a predictable jump in health care spending, amidst a slowdown that began a decade ago. Although we have not returned to the double-digit increases of the past, the authors find little evidence that ACA cost containment provisions produced changes necessary to "bend the cost curve." Cost control will likely play a prominent role in the next round of health reform and will be critical to sustaining coverage gains in the long term...
February 2017: LDI Issue Brief
https://www.readbyqxmd.com/read/28371585/validity-of-field-assessments-to-predict-peak-muscle-power-in-preschoolers
#5
Sara King-Dowling, Nicole A Proudfoot, John Cairney, Brian W Timmons
BACKGROUND: Field-based fitness assessments are time- and cost-efficient. However, no studies to date have reported the predictive value of field-based musculoskeletal fitness assessments in preschoolers. The purpose of this study was to determine the validity of two field assessments to predict peak muscle power in preschool-aged children. METHODS: Four-hundred nineteen 3- to 5-year olds participated (208 girls, 211 boys; mean age: 4.5±0.9 years). Peak power (PP) was evaluated using a modified 10-second Wingate protocol as the criterion standard...
April 3, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28368955/combined-carbohydrate-and-protein-ingestion-during-australian-rules-football-matches-and-training-sessions-does-not-reduce-fatigue-or-accelerate-recovery-throughout-a-week-long-junior-tournament
#6
Nathan A Lee, James W Fell, Nathan W Pitchford, Andrew H Hall, Michael D Leveritt, Cecilia M Kitic
Australian Rules football (ARF) is a physically demanding sport that can induce high levels of fatigue. Fatigue may be intensified during periods where multiple matches are played with limited recovery time. Combined carbohydrate and protein (CHO+PRO) intake during physical activity may provide performance and recovery benefits. The aim of this study was to investigate whether CHO+PRO ingestion during ARF matches and training sessions throughout a tournament would enhance performance or recovery in comparison to CHO-only ingestion...
March 31, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28362023/kinematic-study-of-standing-long-jump-in-preadolescents-before-the-occurrence-of-maximum-growth-age
#7
Matilde Espinosa-Sánchez
The aims of this study were to identify the kinematics characteristics of the standing long jump (SLJ) performance in groups of Mexican girls and boys, with a chronological age such that theoretically, corresponds to the age before the occurrence of the maximum growth. The jump distance is largely dependent on the kinematic values at the time of takeoff. A calculation method was used from video recordings of the sagittal projection of jumps. The location of the body mass center at takeoff was the source for measuring the kinematic values...
January 26, 2017: Anthropologischer Anzeiger; Bericht über die Biologisch-anthropologische Literatur
https://www.readbyqxmd.com/read/28346315/the-effects-of-10-weeks-integrated-neuromuscular-training-on-fundamental-movement-skills-and-physical-self-efficacy-in-6-7-year-old-children
#8
Michael J Duncan, Emma L J Eyre, Samuel W Oxford
Integrated neuromuscular training (INT) has been suggested as an effective means to enhance athletic potential in children. However, few studies have reported the effects of school based INT programs. This study examined the effect of INT on process and product fundamental movement skill measures and physical self-efficacy in 6-7 year old children. Ninety-four children from 2 primary schools were randomised into either a 10 week INT program or a control group CON (n =41) group. Results indicated significantly greater increases in process FMS scores in INT vs CON (P = 0...
March 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28346078/molecular-dynamics-simulation-of-three-plastic-additives-diffusion-in-polyethylene-terephthalate
#9
Bo Li, Zhi-Wei Wang, Qin-Bao Lin, Chang-Ying Hu
Accurate diffusion coefficient data of additives in polymer is of paramount importance for estimating the migration of the additives over time. In this article it is shown how this diffusion coefficient can be estimated for three plastic additives [2-(2'-hydroxy-5'-methylphenyl) (UV-P), 2, 6-di-tert-butyl-4-methylphenol (BHT) and di-(2-ethylhexyl) phthalate (DEHP)] in polyethylene terephthalate (PET) using the molecular dynamics (MD) simulation method. MD simulations were performed at temperatures of 293-433 K...
March 27, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28344461/within-session-sequence-of-balance-and-plyometric-exercises-does-not-affect-training-adaptations-with-youth-soccer-athletes
#10
Mehdi Chaouachi, Urs Granacher, Issam Makhlouf, Raouf Hammami, David G Behm, Anis Chaouachi
The integration of balance and plyometric training has been shown to provide significant improvements in sprint, jump, agility, and other performance measures in young athletes. It is not known if a specific within session balance and plyometric exercise sequence provides more effective training adaptations. The objective of the present study was to investigate the effects of using a sequence of alternating pairs of exercises versus a block (series) of all balance exercises followed by a block of plyometric exercises on components of physical fitness such as muscle strength, power, speed, agility, and balance...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28331259/long-term-follow-up-on-the-donor-foot-after-thumb-reconstruction-using-big-toe-wrap-around-flap-in-two-different-operation-methods
#11
Zhi-Guo Ma, Yong-Jun Guo, Hou-Jun Yan, Qi-Ming Li, Bin Ma
The function of the donor foot has been affected after using big toe wrap-around flap for thumb reconstruction. A modified operation method has been developed to reduce the adverse effect on the donor foot. The current study compared the long-term effect of the classic and the modified operation methods on the donor foot. Gait analysis was carried out, including how the patient walked, the walking speed and walking distance, and how the patient jumped and ran. Plantar pressure was measured while the patient was standing and moving...
February 2017: Indian Journal of Surgery
https://www.readbyqxmd.com/read/28330961/reference-values-for-developing-responsive-functional-outcome-measures-across-the-lifespan
#12
Marnee J McKay, Jennifer N Baldwin, Paulo Ferreira, Milena Simic, Natalie Vanicek, Joshua Burns
OBJECTIVE: To generate a reference dataset of commonly performed functional outcome measures in 1,000 children and adults and investigate the influence of demographic, anthropometric, strength, and flexibility characteristics. METHODS: Twelve functional outcome measures were collected from 1,000 healthy individuals aged 3-101 years: 6-minute walk test, 30-second chair stand test, timed stairs test, long jump, vertical jump, choice stepping reaction time, balance (Star Excursion Balance Test, tandem stance eyes open and closed, single-leg stance eyes closed), and dexterity (9-hole peg test, Functional Dexterity Test)...
March 22, 2017: Neurology
https://www.readbyqxmd.com/read/28315285/effects-of-plyometric-training-on-physical-fitness-in-prepuberal-soccer-athletes
#13
Yassine Negra, Helmi Chaabene, Senda Sammoud, Raja Bouguezzi, Mohamed Aymen Abbes, Younés Hachana, Urs Granacher
This study aimed at examining the effects of plyometric training on stable (SPT) vs. unstable (UPT) surfaces on physical fitness in prepuberal soccer players. Male athletes were randomly assigned to SPT (n=18; age=12.7±0.2 years) or UPT (n=16; age=12.2±0.5 years). Both groups conducted 3 regular soccer training sessions per week combined with either 2 SPT or UPT sessions. Assessment of jumping ability (countermovement jump [CMJ], and standing long jump [SLJ]), speed (10-m, 20-m, 30-m sprint), agility (Illinois agility test [IAT]), and balance (stable [SSBT], unstable [USBT] stork balance test; stable [SYBT], unstable [UYBT] Y balance test) was conducted pre-and post-training...
March 17, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28314994/amino-acids-intake-and-physical-fitness-among-adolescents
#14
Luis Gracia-Marco, Silvia Bel-Serrat, Magdalena Cuenca-Garcia, Marcela Gonzalez-Gross, Raquel Pedrero-Chamizo, Yannis Manios, Ascensión Marcos, Denes Molnar, Kurt Widhalm, Angela Polito, Jeremy Vanhelst, Maria Hagströmer, Michael Sjöström, Anthony Kafatos, Stefaan de Henauw, Ángel Gutierrez, Manuel J Castillo, Luis A Moreno
The aim was to investigate whether there was an association between amino acid (AA) intake and physical fitness and if so, to assess whether this association was independent of carbohydrates intake. European adolescents (n = 1481, 12.5-17.5 years) were measured. Intake was assessed via two non-consecutive 24-h dietary recalls. Lower and upper limbs muscular fitness was assessed by standing long jump and handgrip strength tests, respectively. Cardiorespiratory fitness was assessed by the 20-m shuttle run test...
March 17, 2017: Amino Acids
https://www.readbyqxmd.com/read/28303248/fitness-effects-of-10-month-frequent-low-volume-ball-game-training-or-interval-running-for-8-10-year-old-school-children
#15
Malte Nejst Larsen, Claus Malta Nielsen, Christina Ørntoft, Morten Bredsgaard Randers, Eva Wulff Helge, Mads Madsen, Vibeke Manniche, Lone Hansen, Peter Riis Hansen, Jens Bangsbo, Peter Krustrup
We investigated the exercise intensity and fitness effects of frequent school-based low-volume high-intensity training for 10 months in 8-10-year-old children. 239 Danish 3rd-grade school children from four schools were cluster-randomised into a control group (CON, n = 116) or two training groups performing either 5 × 12 min/wk small-sided football plus other ball games (SSG, n = 62) or interval running (IR, n = 61). Whole-body DXA scans, flamingo balance, standing long-jump, 20 m sprint, and Yo-Yo IR1 children's tests (YYIR1C) were performed before and after the intervention...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28297924/onset-of-anomalous-diffusion-from-local-motion-rules
#16
Sarah de Nigris, Timoteo Carletti, Renaud Lambiotte
Anomalous diffusion processes, in particular superdiffusive ones, are known to be efficient strategies for searching and navigation in animals and also in human mobility. One way to create such regimes are Lévy flights, where the walkers are allowed to perform jumps, the "flights," that can eventually be very long as their length distribution is asymptotically power-law distributed. In our work, we present a model in which walkers are allowed to perform, on a one-dimensional lattice, "cascades" of n unitary steps instead of one jump of a randomly generated length, as in the Lévy case, where n is drawn from a cascade distribution p_{n}...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28277683/hydration-shell-transformation-of-thermosensitive-aqueous-polymers
#17
Kenji Mochizuki, Dor Ben-Amotz
Although water plays a key role in the coil-globule transition of polymers and biomolecules, it is not clear whether a change in water structure drives or follows polymer collapse. Here, we address this question by using Raman multivariate curve resolution (Raman-MCR) spectroscopy to investigate the hydration shell structure around poly(N-isopropylacrylamide) (PNIPAM) and poly(propylene oxide) (PPO), both below and above the cloud point temperature at which the polymers collapse and form mesoscopic polymer-rich aggregates...
March 14, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28270619/massive-increase-in-visual-range-preceded-the-origin-of-terrestrial-vertebrates
#18
Malcolm A MacIver, Lars Schmitz, Ugurcan Mugan, Todd D Murphey, Curtis D Mobley
The evolution of terrestrial vertebrates, starting around 385 million years ago, is an iconic moment in evolution that brings to mind images of fish transforming into four-legged animals. Here, we show that this radical change in body shape was preceded by an equally dramatic change in sensory abilities akin to transitioning from seeing over short distances in a dense fog to seeing over long distances on a clear day. Measurements of eye sockets and simulations of their evolution show that eyes nearly tripled in size just before vertebrates began living on land...
March 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28270140/the-magnitude-of-muscular-activation-of-four-canine-forelimb-muscles-in-dogs-performing-two-agility-specific-tasks
#19
Kimberley L Cullen, James P Dickey, Stephen H M Brown, Stephanie G Nykamp, Leah R Bent, Jeffrey J Thomason, Noël M M Moens
BACKGROUND: The purpose of this study was to measure the muscular activation in four forelimb muscles while dogs performed agility tasks (i.e., jumping and A-frame) and to provide insight into potential relationships between level of muscular activation and risk of injury. Muscle activation in eight healthy, client-owned agility dogs was measured using ultrasound-guided fine-wire electromyography of four specific forelimb muscles: Biceps Brachii, Supraspinatus, Infraspinatus, and Triceps Brachii - Long Head, while dogs performed a two jump sequence and while dogs ascended and descended an A-frame obstacle at two different competition heights...
March 7, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28261066/ring-attractor-dynamics-emerge-from-a-spiking-model-of-the-entire-protocerebral-bridge
#20
Kyobi S Kakaria, Benjamin L de Bivort
Animal navigation is accomplished by a combination of landmark-following and dead reckoning based on estimates of self motion. Both of these approaches require the encoding of heading information, which can be represented as an allocentric or egocentric azimuthal angle. Recently, Ca(2+) correlates of landmark position and heading direction, in egocentric coordinates, were observed in the ellipsoid body (EB), a ring-shaped processing unit in the fly central complex (CX; Seelig and Jayaraman, 2015). These correlates displayed key dynamics of so-called ring attractors, namely: (1) responsiveness to the position of external stimuli; (2) persistence in the absence of external stimuli; (3) locking onto a single external stimulus when presented with two competitors; (4) stochastically switching between competitors with low probability; and (5) sliding or jumping between positions when an external stimulus moves...
2017: Frontiers in Behavioral Neuroscience
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